Have you seen these cups?

I bought these cups last week while thrifting. I think that they are really funky retro-y cute, but I figured that I would sell them on Ebay. I like to be able to include some background info when I sell things but I am coming up empty handed on these little cuties. I think that this is one of the very few times when the internet has let me down & I haven’t been able to find what I have been looking for. So if anyone knows anything about them or can point me somewhere I might not have looked yet I would greatly appreciate it!